| QuillBot Humanizer | Grammarly AI Humanizer | |
|---|---|---|
| Starting price | $8.33/mo | $12/mo |
| Free tier | 125 words | 0 words |
| Bundled detector | Yes | No |
| Founded | 2017 | 2024 |
| Best for | People who already pay for QuillBot's grammar/paraphrase suite and want a decent bonus feature, not a dedicated bypass tool. | Professionals who want more natural-sounding AI-assisted drafts without a dedicated bypass-focused tool. |
Price: QuillBot Humanizer is cheaper to start, at $8.33/mo vs $12/mo.
QuillBot Humanizer: $8.33/mo billed annually, $19.95/mo monthly. Free tier: 125 words, 6 uses/day.
Grammarly AI Humanizer: Included in Grammarly Premium ($12/mo annual) and Business plans.
Free tier: QuillBot Humanizer offers a more generous free tier (125 words).
If you just want to test either tool before paying, QuillBot Humanizer's 125-word allowance gives you more room to evaluate quality.
Detection performance
QuillBot Humanizer: Consistently ranks behind dedicated humanizers on Turnitin and GPTZero in third-party comparisons because it leans on synonym substitution rather than deep sentence restructuring.
Grammarly AI Humanizer: Grammarly is explicit that the feature is meant to improve natural tone rather than guarantee detector evasion, which sets it apart from bypass-first competitors.
AI detector included: QuillBot Humanizer bundles a built-in detector; Grammarly AI Humanizer does not.
Strengths at a glance
QuillBot Humanizer
- Bundled AI detector, grammar checker, and paraphraser in one subscription
- Fast — results in under 5 seconds for short passages
- Color-coded change tracking so you can see exactly what was rewritten
Grammarly AI Humanizer
- Built into an app most professionals already have installed (browser, desktop, Docs)
- Focuses on clarity and flow rather than aggressive detection evasion
- Backed by Grammarly's long-standing grammar and tone engine
Our verdict
Choose QuillBot Humanizer if: people who already pay for quillbot's grammar/paraphrase suite and want a decent bonus feature, not a dedicated bypass tool. Choose Grammarly AI Humanizer if: professionals who want more natural-sounding ai-assisted drafts without a dedicated bypass-focused tool.
Full QuillBot Humanizer review → · Full Grammarly AI Humanizer review →